3 kule o promieniach 3cm, 4cm i 5cm przetopiono na jedną dużą kulę, Oblicz pole powierzchni otrzymanej kuli.
Pc1= 4*9=36
Pc2= 4*16= 64
Pc3= 4*25= 100
100+64+36= 200
Pole kuli o prom 3 cm=4pi*3^2=36pi cm^2
Pole kuli o prom 4 cm=4pi*4^2=64pi cm^2
Pole kuli o prom 5cm=4pi*5^2=100cm^2
36+64+100=200cm^2
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Pc1= 4*9=36
Pc2= 4*16= 64
Pc3= 4*25= 100
100+64+36= 200
Pole kuli o prom 3 cm=4pi*3^2=36pi cm^2
Pole kuli o prom 4 cm=4pi*4^2=64pi cm^2
Pole kuli o prom 5cm=4pi*5^2=100cm^2
36+64+100=200cm^2